23278487 has 2 divisors, whose sum is σ = 23278488. Its totient is φ = 23278486.

The previous prime is 23278483. The next prime is 23278511. The reversal of 23278487 is 78487232.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23278487 - 2² = 23278483 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23278481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11639243 + 11639244.

It is an arithmetic number, because the mean of its divisors is an integer number (11639244).

Almost surely, 2^23278487 is an apocalyptic number.

23278487 is a deficient number, since it is larger than the sum of its proper divisors (1).

23278487 is an equidigital number, since it uses as much as digits as its factorization.

23278487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 150528, while the sum is 41.

The square root of 23278487 is about 4824.7784405090. The cubic root of 23278487 is about 285.5298934166.

The spelling of 23278487 in words is "twenty-three million, two hundred seventy-eight thousand, four hundred eighty-seven".